#!/usr/bin/env bash
# nbdkit
# Copyright Red Hat
#
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# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
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#
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# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

# Test swab filter.

source ./functions.sh
set -e
set -x
set -u

requires_nbdsh_uri
requires_run

define script <<'EOF'
# Read back part of the pattern and check it is byte-swapped.
# Original pattern is:
# 00 00 00 00 00 00 ff f8
# 00 00 00 00 00 01 00 00
# 00 00 00 00 00 01 00 08
# 00 00 00 00 00 01 00 10
# Expected output is:
# 00 00 00 00 00 00 f8 ff
# 00 00 00 00 01 00 00 00
# 00 00 00 00 01 00 08 00
# 00 00 00 00 01 00 10 00

buf = h.pread(32, 65528)
assert buf == bytearray([0, 0, 0, 0, 0, 0, 0xf8, 0xff,
                         0, 0, 0, 0, 1, 0, 0,    0,
                         0, 0, 0, 0, 1, 0, 8,    0,
                         0, 0, 0, 0, 1, 0, 0x10, 0])
EOF
export script

nbdkit --filter=swab pattern size=$((128*1024)) \
       --run ' nbdsh -u "$uri" -c "$script" '
